41 results about "Design flood" patented technology

The invention discloses an SSP scene reservoir group flood control scheduling method considering hydrological forecast uncertainty, and the method comprises the steps: obtaining SSP climate scene meteorological data to drive an SWAT model to generate daily runoff, and deducing and designing a flood hydrograph; a flow error sequence is calculated based on historical simulation and measured data, optimal distribution is optimized through fitting of a multi-probability distribution model, and a 95% confidence interval is generated through Monte Carlo simulation to correct design flood; and constructing an optimization model with the goal of minimizing the highest water level of flood regulation, bringing in various constraints, solving an optimal scheduling process by adopting a discrete differential dynamic programming algorithm, and finally refining an adaptive scheduling rule. The method solves the problems that prediction uncertainty is not considered and solving efficiency is low in the prior art, flood control safety and dispatching adaptability of the reservoir group are improved, and the method is suitable for flood control dispatching of the reservoir group under climate change.

The invention relates to the technical field of flood control planning of water conservancy projects, and discloses a method for determining the designed flood level of a Dongting lake district, which comprises the following steps of: a) constructing a flood peak quantity joint distribution model: acquiring historical flood peak flow of a research area and flood quantity data in corresponding time periods, edge distribution fitting is carried out on the flood peak flow data and the time period flood volume data, and a Copula function is adopted to construct a joint distribution model of the flood peak flow data and the time period flood volume data; b) determining a combined recurrence period and a reasonable peak quantity combination boundary: defining and calculating the combined recurrence period of a design event based on the combined distribution model constructed in the step a), and determining a reasonable region boundary of the combination of the flood peak flow and the time period flood quantity in the combined recurrence period in combination with a preset confidence level; and c) deducing the designed flood level: selecting at least one design peak quantity combination in the reasonable area determined in the step b), obtaining the corresponding flood level through flood regulation calculation, and determining the final designed flood level in combination with the flood control guarantee rate. According to the method, by constructing the flood peak quantity joint distribution model and introducing confidence level screening reasonable combination, the scientificity and reliability of determining the design flood level of the Dongting lake area are remarkably improved.

The invention relates to a mountain river flood dynamic rehearsal method, device and equipment based on big data fusion and a medium. The method comprises the following steps: acquiring a multi-source fusion data set of a target mountain river; based on the multi-source fusion data set, recognizing the flood type of the target mountain river in combination with a preset threshold rule to obtain the flood type and cause parameters; according to the flood type and the cause parameter, calculating a design flood peak flow value of each node in the target mountain river; according to each design flood peak flow value, performing section-by-section trial calculation through an energy equation to obtain a design flood surface line; and performing dynamic simulation processing on the flood routing process of the target mountain river based on the designed flood water surface line, and generating a flood routing dynamic simulation report of the target mountain river. The method can accurately adapt to the characteristics of diverse causes and complex propagation process of flood in a mountain river, and remarkably improves the refinement degree and reliability of flood rehearsal.

The invention provides a hydrodynamic model-based mountain river flood diversion tunnel line and scale optimization design method, which comprises the following steps of: constructing a one-dimensional hydrodynamic mathematical model of a research area drainage basin by adopting MIKE11 software, and constructing a one-dimensional hydrodynamic model of the research area drainage basin according to the one-dimensional hydrodynamic mathematical model of the drainage basin, boundary conditions and calibrated comprehensive roughness; and calculating designed flood water surface lines of different frequencies of the urban section. According to the actual situation of a city, aiming at urban flood causes and main problems existing in a current flood control system, engineering measure schemes such as flood control reservoir construction, beach retreating and river returning, river regulation, embankment heightening and flood diversion channel building are proposed, and a flood diversion tunnel route and planning optimization research is developed on the basis of a hydrodynamic model. Numerical simulation of flood disasters is completed by means of the modern information technology, a complete disaster prevention and control system is established for achieving the purposes of scientization, high efficiency and automation of disaster prevention and relief decision, the urban flood prevention capacity can be comprehensively improved, and the life and property safety of the masses is guaranteed.

The application provides a built hydropower station operation water level lifting method based on staged design flood, comprising: analyzing flood seasonal variation law of a target hydropower station reservoir, carrying out flood staging on the target hydropower station reservoir flood, and proposing design flood and design flood hydrograph of different periods; constructing a hydropower station reservoir area water surface line calculation model, combining the design flood of the target hydropower station reservoir to calculate the reservoir water surface line under each starting push water level of different periods; constructing a hydropower station flood regulation model, combining the design flood hydrograph of the target hydropower station reservoir to calculate the reservoir highest flood regulation water level under each starting regulation water level of different periods; based on the reservoir water surface line and the highest flood regulation water level, combing the water level lifting opportunity, the water level lifting scheme is drafted. Through the application, the problem that the existing related technology cannot fully tap the comprehensive benefits of the project is solved.

The invention relates to the crossing field of water conservancy projects and computer simulation technologies, in particular to a river and canal protection engineering failure dynamic judgment and boundary updating method, which comprises the following steps of: marking a protection engineering area and setting the protection engineering area as a non-scour boundary during simulation initialization, and calculating hydrodynamic parameters such as water depth and flow velocity in each time step; comparing with the water depth-flow velocity relationship of a gabion, the design flood control standard of a stilling pool, the bottom elevation of an anti-scour wall and other anti-scour thresholds, if the thresholds are exceeded, judging that the boundary is invalid and dynamically updating the boundary to be a scoured boundary, and continuing simulation by combining dynamic dry and wet grid judgment and GPU parallel calculation; according to the method, water flow-sediment-riverbed-protection engineering collaborative simulation is achieved, the progressive damage process is precisely restored, the erosion and deposition simulation error is lower than 9%, universality is high, and a reliable quantification tool is provided for flood control safety evaluation and optimization design of wading projects such as river and canal crossing engineering.

This invention relates to a method for estimating design floods using coupled GAMLSS and BMA models under changing environments, and pertains to the field of hydrological response and its impact assessment technology. The invention first quantitatively identifies changes in meteorological and hydrological elements under future changing environments, and then performs inconsistency frequency analysis based on their distribution characteristics and variation patterns. Then, based on the inconsistency frequency analysis results obtained from different global climate models, it integrates design flood data using the BMA model. This effectively avoids the problem of homogenization in the ensemble simulation results caused by the uncertainty of input data when directly applying the BMA method to runoff sequences, which leads to significant deviations in the design flood analysis results. This invention solves the uncertainty and inconsistency problems faced by current conventional methods.

The invention provides a reservoir spillway flood regulation calculation method and device and electronic equipment, and the method comprises the steps: firstly selecting a reservoir original design flood hydrograph of a frequency corresponding to a target standard, then selecting a gate control working condition of a reservoir spillway, and carrying out the regulation calculation of the flood of the reservoir spillway based on the reservoir original design flood hydrograph and a reservoir original discharge capacity curve; and determining a reservoir design flood hydrograph and a reservoir discharge capacity curve corresponding to the gate control working condition, and then performing flood regulation calculation by adopting a water balance method based on the gate control working condition, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the normal storage level of the reservoir and the water level storage capacity curve of the reservoir to obtain a reservoir flood regulation hydrograph. By adopting the method, the efficiency and the accuracy of reservoir flood regulation calculation can be improved, so that the working efficiency of reservoir project spillway type comparison and selection can be improved.

The invention relates to the field of tailings ponds, and discloses a tailings pond rainfall early warning grade judgment method, device and equipment and a medium. The method comprises the following steps: acquiring early warning indexes of a plurality of early warning levels and a first early warning threshold value issued by a local meteorological department of a region where the tailings pond is located; acquiring a plurality of real-time rainfall monitoring data of the tailings pond, and determining a first early warning level of the tailings pond; calculating the multi-duration rainfall corresponding to the designed flood control standard of the tailings pond; calculating a second early warning threshold value of a plurality of early warning levels of the multi-duration rainfall corresponding to the design flood control standard of the tailings pond; according to each real-time rainfall monitoring data and each second early warning threshold, determining a second early warning level of the tailings pond; and determining a global rainfall early warning level of the tailings pond according to the first early warning level and the second early warning level. According to the application, a more perfect scientific theoretical basis is provided for selection of early warning indexes and setting of an early warning threshold value of the tailing pond rainfall online monitoring system, and safe production operation management of the tailing pond is better guided.

The invention relates to the technical field of regional synthesis, and discloses a multi-landform parameter empirical formula regional synthesis method, system and device and a medium, and the method comprises the steps: obtaining the basic information of hydrological sites of a research region, and constructing a regional result table according to the basic information of the hydrological sites; using a preset empirical formula general equation to construct a general equation set corresponding to the regional result table; generating a target general equation of the research area according to the general equation set; obtaining landform influence parameters of an actual area, and constructing a landform parameter feature combination of the landform influence parameters; and calculating a formula parameter fitting degree of the landform parameter feature combination by using the target general formula, and determining a regional comprehensive empirical formula according to the formula parameter fitting degree. According to the method, quantitative expression of the specific actual region flood peak flow and various landform parameter characteristics can be achieved, and accurate and effective design flood calculation is achieved.

This application discloses a method and device for calculating the flood discharge cross-section of cross-river bridges, belonging to the field of intelligent bridge design technology. It includes: converting bridge data into a processable data structure for standardized bridge data; and ensuring the consistency of mathematical representations of core parameters such as flood level, riverbed, and piers by establishing a unified spatial coordinate benchmark and data structure mapping rules. The method employs a dual-cutting operation on the riverbed line and pier outline using the design flood level line. By introducing a secondary cutting operation on the underwater pier outline using the riverbed line, a dynamic determination mechanism for the flood-resistant pier outline is constructed, fully coupling the spatial interaction between natural riverbed morphology and artificial structures. This ensures that the calculation results simultaneously meet the flood discharge safety standards of the water conservancy industry and the structural design requirements of bridge engineering, providing high-confidence technical support for the planning, design, and flood control assessment of cross-river bridges.

The invention discloses a design flood deduction method and system for a multi-flood-source complex lake region, and relates to the field of hydrology and water conservancy computation.The method comprises the steps that a flood deduction deep learning model is constructed according to a convolutional neural network, a long-short-term memory network and a space-time attention mechanism; acquiring a current flood characteristic variable; based on the current flood characteristic variable, according to the edge distribution function and the Copula function, constructing a joint distribution function; according to the joint distribution function and the similarity index, an important sampling method, a Monte Carlo simulation method and an amplification method are adopted to generate a flood hydrograph; and according to the flood deducing deep learning model and the flood hydrograph, simulating spatial and temporal distribution characteristics of different typical floods in the lake area under different flood source flow proportions, and obtaining the water level hydrograph of different typical floods at each point location of the lake area. According to the method, various typical flood processes under different flood source flow proportions are deduced, and the calculation efficiency and precision are improved.

The invention discloses a reservoir group flood resource utilization chain risk analysis method, which comprises the steps of fitting error probability distribution based on weather rain-free forecast data, and generating a water recession section flow probability forecast scene set; inputting a recession section flow probability forecasting scene set, and determining a reservoir regulation starting water level probability sample by adopting a dynamic allocation method considering flood space distribution and a real-time state; based on historical flood data, a graph neural network is adopted to learn reservoir group topological correlation features to optimize a spectral clustering process, and a neural gas algorithm is utilized to generate a design flood hydrograph scene; a whole-process flood control chained risk decision-making tree is constructed by fusing a scheduling starting water level probability sample and a design flood hygrograph scene, and a double-threshold risk early warning mechanism based on CVaR and VRR is established through full-path scheduling simulation and risk contribution degree backtracking analysis. According to the invention, multi-source uncertain chained coupling is realized, and the accuracy of risk assessment and the reliability of decision making are improved.

This invention discloses a method for estimating long-duration design tidal process lines, comprising: preprocessing and frequency analysis of historical tidal data to obtain the design high tide level, design flood tide range, and design ebb tide range; selecting a typical long-duration tidal process containing the highest tide level, and selecting a "one flood, one ebb" process at a later position as the main tidal type according to the principle of "high tide level - long duration - later high tide level", with the rest being secondary tidal types; using the design high tide level, design flood tide range, and design ebb tide range to perform same-frequency combination design on the main tidal type to obtain the design main tidal type process; using the scaling ratio of the corresponding phase points of the design main tidal type and the measured main tidal type as a benchmark, scaling the secondary tidal types accordingly to obtain the design secondary tidal type processes; and splicing the results to obtain the complete long-duration design tidal process. This invention overcomes the limitation of existing methods that can only deduce "one flood, one ebb" processes and is applicable to the calculation of any long-duration design tidal process.

The invention relates to the technical field of watershed hydrological model parameter calibration, in particular to a hydrological model parameter calibration method for a watershed lacking hydrological data, which comprises the following steps: determining a watershed A lacking data and a watershed B controlled by an adjacent hydrological station (reference station) with data, and collecting hydrometeorological and underlying surface feature data of the two watersheds; calculating the design flood of the drainage basin A and the drainage basin B by using a rainstorm runoff survey algorithm; comparing the design flood calculated by the rainstorm runoff of the watershed B close to the data with the design flood calculated by the actually measured flow data, and determining a flood correction coefficient kappa for correcting the design flood calculated by the watershed A lacking the data by using the rainstorm runoff calculation algorithm; inputting the model parameters of the data-lacking watershed A and the design surface rainstorm into a hydrological model; simulating an outlet section flood; and comparing a simulation result with a corrected rainstorm runoff checking result, analyzing parameter sensitivity, and adjusting and optimizing model parameters. The method is suitable for parameter calibration of the data-lacking small-watershed mountain torrent forecasting model, and a new means is provided for flood control and disaster reduction.

The invention discloses a probability design flood deduction method and system based on parameter and form uncertainty. The method comprises the steps of determining distribution parameter uncertainty of flood frequency analysis and process line form uncertainty of design flood process line dynamic synthesis; constructing a Monte Carlo simulation framework; monte Carlo simulation circulation is carried out based on a Monte Carlo simulation framework, combined sampling is carried out on the distribution parameters and the dynamic weight vector expressing the form uncertainty of the hydrograph in each Monte Carlo simulation circulation, complete calculation from design flood peak flow deduction to design flood hydrograph dynamic synthesis is carried out, and the design flood hydrograph is obtained. Generating a design flood hydrograph; and aggregating all the design flood hydrographs generated by the Monte Carlo simulation cycle to obtain a probabilistic result for flood control design. According to the method, the design flood inference is converted from certainty to probability, the result reliability can be systematically evaluated, and a scientific basis is provided for risk-based flood control decisions.

The application relates to a flood diversion strategy management method and system for joint operation of a flood diversion and storage area, and a medium. The method comprises the following steps: obtaining high spatio-temporal resolution underlying surface data of each flood diversion and storage area, and constructing a two-dimensional hydrodynamic model; simulating and calculating the flood diversion and storage process of the flood diversion and storage area; determining the flood diversion and storage duration according to the design flood storage volume of different flood diversion and storage areas; simulating a flood scene set of each flood diversion and storage area according to different frequency flood conditions; constructing a knowledge graph for the operation of the flood diversion and storage area, and determining multiple flood diversion schemes; and based on a target function and a constraint condition, a target flood diversion scheme is obtained through comparison and selection. The application is started from the perspective of joint operation of flood diversion and storage of multiple flood diversion and storage areas, meets the rapid decision-making demand of key indicators for the operation of the flood diversion and storage area, and reduces the loss caused by flood disasters.

The invention relates to the field of bridge engineering, in particular to a bridge early warning water level calculation method and system based on flow moduli, and the method comprises the steps: obtaining a bridge location section water level and flow relational expression and a flow modulus expression according to river shoal and river channel conditions, and determining the flow modulus at a specific flood frequency; analyzing a flow modulus and water depth relation curve according to the flow modulus expression, and obtaining the flow modulus and water depth relation curve under the current condition by combining the riverbed design information and the relation curve; combining the relation curve to obtain a current situation and design flood flow analysis formula, and calculating a current situation river flow modulus; obtaining a warning flood correlation expression based on the flow modulus expression, and deducing a flow relational expression between the warning flood and the known flood frequency; according to the method, derivation and analysis are conducted based on the data model, various factors and change rules of the river are considered, the accuracy and reliability of early warning are improved, and bridge flood prevention early warning is achieved.

The invention relates to the technical field of river channel flood discharge, and discloses a river channel flood discharge capacity improving method and device for a plain river network district, and the method comprises the steps: obtaining the upstream and downstream water surface ratio drop, the overflowing flow, the water level of regions on both banks and the submerging condition of both banks of a target flood discharge river channel in the plain river network district in a historical flood discharge period; the upstream and downstream water surface gradient, the overflowing flow, the water levels of the areas on the two banks and the submerging conditions of the two banks are analyzed, and the flood discharge level of the target flood discharge river channel is determined; if the flood discharge level of the target flood discharge river channel does not conform to the flood discharge capacity of the flood discharge river channel design, the pump station design flow and the pump station stage number are obtained, and a multi-stage relay water lifting pump station arrangement scheme is determined based on the pump station design flow and the pump station stage number; and the pump stations in the target flood discharge river channel are scheduled and operated by using the multi-stage relay water lifting pump station layout scheme. The flood discharge capacity of the river channel in the plain river network area is improved, and flood disaster loss and influence are reduced.

The invention discloses a non-flood season staged design flood calculation method for a hydrological data shortage area, and relates to the technical field of hydrological calculation and water resource engineering, and the method comprises the following steps: obtaining rainstorm data and reference station length sequence flow data of a design drainage basin; a rainstorm flood response model is established, and flood season design flood is deduced according to flood season rainstorm data; constructing a reference station staged frequency response curved surface, and calculating a high-to-low ratio vector of the flood characteristics of the reference drainage basin in different return periods; introducing hydrology and geography similarity weight, mapping the high-to-low ratio vector of the reference drainage basin to the design drainage basin, and calculating a non-flood season staging design flood initial value; and dynamic correction is performed in combination with the historical flood influence factors, and finally the design basin stage design flood is obtained. According to the method, rainstorm data, historical flood information and reference station flow information are fused, space-time difference and flood cause characteristics are considered, the design flood deduction precision and reliability are improved in a hydrological data shortage area, and the method is suitable for hydraulic engineering design and planning.

The invention discloses an evaluation method for quantifying the influence of land subsidence on dike design standards. According to the method, multi-source data such as hydro meteorology, terrain and land subsidence monitoring are fused, and a hydrological-hydrodynamic coupling model is driven to simulate river channel design flood levels in different design return periods; selecting a typical section, and quantitatively calculating the space cumulative effect of land subsidence and the relative reduction value of the levee crest elevation caused by the space cumulative effect; and a three-dimensional response relation model of design flood level-settling volume-standard adjustment amplitude is constructed, and the reduction degree of the flood control design standard is accurately quantified. According to the method, the simplification limitation of a traditional linear superposition method is broken through, quantitative correlation between the land subsidence and the flood control design standard downshift amplitude is achieved, and an integrated evaluation process of land subsidence, design standard adjustment and engineering coping strategies is established; scientific basis and technical support are provided for embankment design standard review, safety evaluation and flood control and disaster reduction decision making.

This invention provides a method for determining dual control indicators for concrete dam deformation considering flood control risk, comprising the following steps: S1, Determination of deformation monitoring indicators based on the low-probability method: using measured data as a monitoring sequence, establishing a sample of typical effect sizes; assuming and testing the sample distribution to obtain the sample distribution function; using the design flood control risk as the failure probability, and employing the low-probability method to obtain the concrete dam deformation monitoring indicators; S2, Determination of deformation rate monitoring indicators considering flood control risk: determining the design flood control risk and performing flood regulation calculations in conjunction with the design flood standard; establishing a statistical model and performing regression analysis; calculating the rate of change of water pressure components, and taking the maximum value of the rate of change of water pressure components as the deformation rate monitoring indicator under the design flood standard. This method determines the concrete dam deformation monitoring indicators and deformation rate monitoring indicators, enabling timely monitoring of dam deformation when the reservoir water level rises rapidly, and preventing the monitored dam deformation from exceeding the determined deformation monitoring indicators.

This invention discloses a method for determining the dynamic flood control limit water level of a reservoir. The method first uses cluster analysis to segment the reservoir's flood season. Then, it uses the original design flood control limit water level as the lower limit of dynamic control, the flood control limit water level determined according to the phased design floods as the suggested lower limit of dynamic control, the flood control limit water level determined considering pre-release as the upper limit of dynamic control, and the flood control limit water level determined considering the uncertainties of pre-release and flood forecast as the suggested upper limit of dynamic control. Finally, it determines the dynamic control range of the flood control limit water level. When determining the dynamic flood control limit water level and pre-release value, an integer variable is introduced to express the existing flood control scheduling rules of the reservoir as constraints to establish a pre-release optimization model. The method for determining the dynamic flood control limit water level of a reservoir provided by this invention improves the scientificity and operability of dynamic water level control during the flood season, and can be applied to the refined management of reservoir flood control, improving the power generation and comprehensive utilization benefits of the reservoir.

The invention provides a method, a system, equipment and a medium for calculating design flood of a small watershed in a mountainous area, designs a simple method for solving the problem that the peak flood flow of a downstream section is smaller than that of an upstream section in design flood calculation of the small watershed in the mountainous area, and is extremely suitable for the small watershed in the mountainous area with steep upstream, gentle downstream and less than 100km < 2 > in rainwater collection area. When the design flood is calculated, the abnormal phenomenon that the peak discharge of the downstream section is smaller than that of the upstream section occurs, the peak discharge of the downstream section can be deduced through the method, the evolution rule of the flood from the upstream to the downstream is truly reflected, and therefore the design flood can be calculated more scientifically; scientific and reliable basis is provided for flood control design of water conservancy projects, the construction scale of newly-built reservoirs or river regulation projects is reasonably determined, the project safety and reliability are greatly improved, and therefore economic losses are reduced or even avoided.

This invention relates to the field of watershed design flood technology, and more particularly to a method for estimating watershed design floods based on a conceptual hydrological model. The method includes the following steps: spatially dividing the watershed according to the underlying surface type and elevation distribution characteristics to form slope zones and channel zones, and determining the water transfer sequence between each zone to establish the zoned hydrological structure of the conceptual hydrological model; based on the zoned hydrological structure, extracting historical flood events and identifying the critical humidity conditions for the transition from water storage to runoff generation in each zone; mapping the critical humidity conditions to zoned runoff generation parameters and integrating them to form a baseline parameter structure; extracting the temporal structure characteristics of design storms in the watershed and calculating their structural similarity to historical flood events; this invention, through the estimation of watershed design floods, enables accurate calculation of the watershed design flood hydrograph and reliable extraction of the design flood peak value, thereby improving the accuracy of design flood simulation and the reliability of flood control projects.

The invention provides a flood drainage tunnel and a flood self-adaptive adjustment design method thereof. The flood drainage tunnel is used for flood control and drainage in a karst trough and valley area. The flood drainage tunnel comprises a tunnel body, breast wall type gate holes and vent holes. The flood self-adaptive adjustment design method comprises the following steps: determining a designed submerging water level of a flood drainage area under a designed flood standard, calculating a designed discharge flow of a flood drainage tunnel, and initially planning relevant parameters of the flood drainage tunnel; and the calculation is repeated until the relevant parameters of the flood drainage tunnel meet the flood control requirements under the designed flood standard of the flood bearing area. The structure is simple, the cost is low, manual dispatching intervention is avoided, the response time is short, free flow exists in the tunnel, the hydraulic condition is good, and in a small-scale flood event, rapid flood drainage is achieved through the self-flow open drainage function of the flood drainage tunnel; under the condition of large-scale flood, a combined peak regulation mechanism is formed by combining the natural reservoir capacity of the depression and a tunnel breast wall type gate hole leakage control system, fluctuation of flood magnitude is flexibly coped with, and flood control safety of upstream and downstream areas is ensured.

The present application relates to the field of bridge engineering, specifically to a bridge early warning water level calculation method and system based on flow modulus, according to the river beach and river channel conditions to obtain the bridge section water level flow relationship and flow modulus expression, and determine the flow modulus under a specific flood frequency; according to the flow modulus expression to analyze the flow modulus and water depth relationship curve, combined with the riverbed design information and the relationship curve to obtain the flow modulus and water depth relationship curve under the present condition; combined with the above relationship curve to obtain the present and design flood flow analysis formula, and calculate the present river flow modulus; based on the flow modulus expression to obtain the warning flood correlation, deduce the flow relationship of the warning flood and the known flood frequency; through the flow relationship and the relationship curve under the present condition to analyze the water level under the warning flood frequency, the present application is based on data model to deduce and analyze, considers various factors and change law of river, improves the accuracy and reliability of the early warning, realizes the bridge flood control early warning.

The application provides a global arbitrary position small watershed design flood rapid calculation method, relates to the technical field of hydrology and water resources technology, defines a to-be-calculated design flood region as a target point, obtains watershed characteristic parameters, rainstorm statistical parameters and runoff yield statistical parameters of the target point, combines a reasoning formula of a target watershed, and calculates each frequency design flood of the small watershed; the obtaining process of the watershed characteristic parameters comprises the following steps: generating a target region water system and a watershed boundary vector data set based on DEM data, obtaining a watershed boundary above the target point according to the target region water system and the watershed boundary vector data set, and obtaining the watershed characteristic parameters through the watershed boundary above the target point. The application realizes the extraction of the watershed boundary above a global arbitrary section point by establishing spatial indexes on the basis of a global sub-watershed boundary data set and a global water system data set, and greatly improves the flood analysis efficiency.

The invention discloses a reservoir compensation scheduling flood regulation calculation method and system considering output resistance. The method comprises the following steps: acquiring basic data; determining the maximum discharge capacity of the reservoir under the condition of considering the output resistance by adopting a golden section method; determining the average outbound flow of the reservoir in the current time period through a multi-factor judgment criterion, and calculating the reservoir capacity and the reservoir water level; judging whether the last reservoir water level in the current time period exceeds the flood control high water level or is lower than the flood control limited water level, and if yes, updating the average reservoir outlet flow, the reservoir capacity and the reservoir water level according to a time period division method; and repeating the steps, and performing flood regulation calculation for different design frequencies and typical flood processes. According to the method, by constructing the outbound flow judgment criterion under the multi-factor condition, self-adaption to different types of design flood is achieved, the unit overcurrent capacity under the output resistance condition is accurately calculated based on the golden section method, and the method has the advantages of being high in calculation precision and high in universality.

The invention provides a rainstorm flood characteristic analysis and design flood calculation method for a region lacking data, and the method comprises the following steps: analyzing the topographic geology, hydrological conditions, river systems and other natural conditions of the region lacking data, and mastering the basic environment characteristics of the region; carrying out rainstorm characteristic analysis and flood characteristic analysis, including flood, flood encountering, flood composition and the like over the years; and constructing a flood control foundation and integrally designing flood. Basic information is prepared, flood control standards are determined, flood control station overall design flood work is carried out, and the flood control station overall design flood work comprises calculation of flood control station overall design flood through a peak and W24h flood volume same-frequency amplification method and typical flood selection and design flood amplification; and flood calculation is designed in each link. And performing branch design flood and reservoir dam site design flood calculation, and completing the whole process work of design flood calculation in combination with the requirements of the basin general situation, the reservoir design flood and the like. Research results have important practical significance for guaranteeing flood control safety of cities and towns along the mountain river.